EP4101987A1 - Outil de forage et procédé de production d'un forage dans le sol - Google Patents

Outil de forage et procédé de production d'un forage dans le sol Download PDF

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Publication number
EP4101987A1
EP4101987A1 EP21178238.8A EP21178238A EP4101987A1 EP 4101987 A1 EP4101987 A1 EP 4101987A1 EP 21178238 A EP21178238 A EP 21178238A EP 4101987 A1 EP4101987 A1 EP 4101987A1
Authority
EP
European Patent Office
Prior art keywords
outlet opening
drilling tool
fluid
removal device
drill shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP21178238.8A
Other languages
German (de)
English (en)
Inventor
Matthias MAYINGER
Andreas Stimpfle-Ziegler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bauer Spezialtiefbau GmbH
Original Assignee
Bauer Spezialtiefbau GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bauer Spezialtiefbau GmbH filed Critical Bauer Spezialtiefbau GmbH
Priority to EP21178238.8A priority Critical patent/EP4101987A1/fr
Priority to PCT/EP2022/064200 priority patent/WO2022258379A1/fr
Priority to US18/568,052 priority patent/US20240271382A1/en
Publication of EP4101987A1 publication Critical patent/EP4101987A1/fr
Pending legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/22—Placing by screwing down
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
    • E02D3/126—Consolidating by placing solidifying or pore-filling substances in the soil and mixing by rotating blades
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22—Piles
    • E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
    • E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/24—Placing by using fluid jets
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/003—Drilling with mechanical conveying means
    • E21B7/005—Drilling with mechanical conveying means with helical conveying means
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/06—Dredgers; Soil-shifting machines mechanically-driven with digging screws

Definitions

  • the invention relates to a drilling tool for creating a borehole in the ground, with a tubular drill shaft, at least one removal device which is designed to remove soil material, a supply device for supplying a fluid through the drill shaft through at least one outlet opening for the fluid into the borehole, and at least one mixing element extending radially to the drill shaft, which is arranged on the drill shaft at an axial distance from the removal device and is designed for mixing soil material with the fluid, according to the preamble of claim 1.
  • the invention further relates to a method for creating a bore in the ground according to the preamble of claim 12.
  • the drilling tool can be designed with an auger, for example, which is drilled into the ground while removing soil material.
  • the soil material broken up by a removal device on the auger can be conveyed upwards into an upper area of the bore.
  • a hardenable suspension can be introduced via an outlet opening on the drill shaft, the suspension being mixed with the comminuted soil material by mixing elements on the drill shaft in order to produce a so-called soil mortar in situ.
  • the drilling tool is withdrawn from the borehole, optionally with the further supply of drilling suspension and rotation of the drilling tool for further mixing, a finished soil mortar is produced, which can then harden to form the foundation element.
  • the invention is based on the object of specifying a drilling tool and a method for creating a borehole in the ground, with which a particularly good introduction of fluid into the borehole can be achieved.
  • the drilling tool according to the invention is characterized in that at least one first outlet opening is arranged in the region of the removal device and at least one second outlet opening is arranged at an axial distance from the at least one first outlet opening and that at least one adjusting device is provided on the feed device, with which the at least one first outlet opening and /or the at least one second outlet opening can be blocked, wherein fluid can optionally be introduced into the bore via the at least one first outlet opening and/or the at least one second outlet opening.
  • a first basic idea of the invention is to provide several outlet openings along the drill shaft. It is a further basic idea of the invention that an adjusting device is provided with which at least one outlet opening can be blocked as desired. In the case of the drilling tool according to the invention, it is thus possible to control the introduction of fluid into the bore in a targeted manner at specific points in time via specific outlet openings.
  • fluid when drilling, fluid can be introduced in the region of the removal device, so that the drill cuttings removed can be mixed with the fluid, in particular a drilling suspension, directly at the removal device.
  • a particularly good mixing result can already be achieved when drilling will.
  • the drill shaft is withdrawn from the borehole, a further supply of drilling suspension in the area of the removal device can worsen a mixing result, since when the drilling tool is pulled upwards, drilling suspension, which is introduced into the borehole at the lower end of the drilling tool, is hardly mechanical can be stirred.
  • lower first outlet openings can be blocked via the actuating device, while a further supply of suspension can take place via axially spaced upper second outlet openings.
  • the suspension introduced above can be further mixed with the removed soil material by the drilling tool with arranged mixing elements and/or the removal device. In this way, a particularly good mixture and, in particular, a high-quality and very even floor mortar can be efficiently created. In this way, particularly solid foundation elements can be produced in the ground.
  • a wide variety of constellations for feeding a fluid into a bore can be set via the at least one adjusting device. In this way, it can be fed in only via individual entry openings or via several exit openings at the same time.
  • a particularly advantageous embodiment of the invention is that the at least one first outlet opening and the at least one second outlet opening can be blocked alternately by the at least one adjusting device, with fluid being able to be introduced into the bore via the at least one first outlet opening and/or the at least one second outlet opening is, while the at least one second outlet opening or the at least one first outlet opening is blocked.
  • a changeable blockability can ensure that fluid is not introduced at the same time via two axially spaced outlet openings.
  • the fluid can be a flowable medium, in particular a liquid or a suspension.
  • the drilling tool can have a removal device for removing soil material only at its lower end region.
  • a removal device for removing soil material only at its lower end region.
  • at least one first removal device to be located on a lower end area of the drill shaft and at least one second removal device is arranged axially above the first removal device.
  • the second removal device can be provided on an upper end region of the drilling tool, so that soil material that has fallen along the borehole wall can also be reliably removed when the drilling tool is retracted.
  • the outlet openings are preferably located on and/or between the two removal devices.
  • the at least one mixing element prefferably be arranged between the first removal device and the second removal device.
  • soil material removed by the two removal devices can be reliably agitated by the mixing device both during drilling and when retracting.
  • a plurality of mixing elements are preferably arranged along the drill shaft.
  • a particularly good mixing result can be achieved in that the removal device has at least one support strip which extends radially to the drill shaft and on which removal elements for removing soil material are arranged, and in that a first line channel is formed on or in the support strip , along which one or more outlet openings are provided. Fluid can thus be introduced via the support bar of the removal device, distributed over the diameter of the bore. This ensures particularly good distribution and mixing.
  • a particularly good mixing result can be achieved in that the mixing element has a support arm and that a second duct is formed on or in the support arm, along which one or more outlet openings are provided.
  • the mixing element can be formed from just the support arm or from additional stirring or mixing members on the support arm.
  • a support arm of the at least one mixing element, which extends in the radial direction away from the drill shaft, can also result in good distribution and mixing over the diameter of the bore.
  • a further preferred embodiment of the invention consists in that at least one outlet opening is arranged directly on the drill shaft. Especially one or more outlet openings can be provided in the lower end area of the drill shaft close to the removal device, since particularly strong mixing takes place there due to the mechanical energy input.
  • the adjusting device can be designed in any suitable manner, for example with electrically controllable adjusting valves.
  • a particularly expedient configuration of a drilling tool according to the invention is that the adjusting device comprises at least one movable adjusting element which can be adjusted between a closed position and an open position.
  • the actuating elements can be flaps or slides, which can be controlled individually by actuators or mechanically by a central confirmation linkage.
  • one or more adjusting elements can be arranged centrally in the drill shaft, so that, for example, an opening or release of a flow to a lower region of the drill shaft is made possible.
  • the adjusting element can block or release a through-channel in the drill shaft.
  • each line channel it is particularly advantageous for each line channel to be assigned an actuating element.
  • it can be set whether fluid is to be introduced via these or not.
  • a part of the drill shaft can also be blocked or opened by means of an actuating element.
  • a particularly reliable control of the at least one adjusting element by the adjusting device can be brought about by the fact that the adjusting device can be actuated by changing the rotation of the drill shaft. As a result, a further simple and robust design of the drilling tool can be achieved.
  • the at least one adjusting element can be adjusted mechanically by a link adjusting mechanism.
  • a mechanical control link can be provided along the drill shaft, along which an actuating element or an actuating cam of the actuating element rests and is guided.
  • the actuating element can be displaced along the connecting link with the actuating cam, with the actuating element being able to assume the closed position on the one hand or the open position on the other hand. In this way, a simple mechanical control can be achieved.
  • an opening of the at least one lower outlet opening can be brought about, while when the drilling tool is withdrawn from the borehole with the opposite direction of rotation, the at least one lower outlet opening is automatically closed by the predetermined link setting mechanism.
  • the invention further relates to a method for creating a borehole in the ground, wherein the drilling tool according to the invention described above is used and a fluid is selectively introduced into the borehole via at least one first outlet opening and/or at least one second outlet opening.
  • an expedient variant of the method can be implemented in that the fluid is introduced during drilling via the at least one first outlet opening, which is arranged in a lower end region of the drill shaft, and that the fluid is introduced via the at least one second outlet opening is introduced into the bore above the first outlet opening, the drilling tool being rotated.
  • This method can be used in particular to produce a high-quality soil mortar in the well.
  • a hardenable suspension is introduced as the fluid, with a foundation element being produced in the ground in the bore.
  • the soil mortar produced in the bore from the removed soil material and the supplied hardenable fluid can harden to form a foundation element, in particular a foundation pile.
  • the method according to the invention makes it possible to produce a particularly well-mixed soil mortar and thus a very homogeneous soil mortar which hardens to form a high-quality foundation element.
  • the risk of defects forming in the foundation element is significantly reduced or even completely avoided.
  • a drilling tool 10 is used in connection with the Figures 1 to 4 explained.
  • the drilling tool 10 comprises a tubular drill shaft 12 with an inner cavity 14.
  • the first removal device 21 has a short drill helix 18 with two passage openings 19 .
  • Tooth-like removal elements 26 for removing soil material are arranged in a basically known manner along two first support strips 24 extending in the radial direction.
  • the first support strips 24 are hollow and form a first line channel 32, which runs in the radial direction.
  • the first duct 32 is connected to a central supply device 30 with a central line 31 in the hollow drill shaft 12 for supplying a liquid or suspension.
  • the liquid or the suspension can flow out via first outlet openings 35 along the first support strips 24 .
  • a plug-like drill pipe connection 16 is arranged at an upper end of the drill shaft 12 in order to connect the drilling tool 10 to a hollow drill rod, not shown, which is rotatably mounted and driven in a basically known manner on a preferably mobile drilling device. Liquid or suspension can be fed from the drilling device to the feed device 30 in the drilling tool 10 via the drill rods.
  • a second removal device 22 directed upwards with tooth-like removal elements 26 is arranged directly below the drill pipe connection 16 .
  • the removal elements 26 of the second removal device 22, unlike the removal elements 26 of the first removal device 21, are directed upwards in order to break up any soil material that may have fallen in when the drilling tool 10 is rotated and withdrawn from a drilled hole and to ensure that the drilling tool is reliably withdrawn from a hole in the ground.
  • the second removal device 22 can also have two opposite and radially directed second support strips 25 which are hollow in order to form a second line channel 33 .
  • the second line channels 33 open into the central line 31 of the feed device 30, as illustrated in FIG 4 is shown.
  • axially and/or radially offset mixing elements 40 with radially directed support arms 42 are formed on the drill shaft 12 , on which mixing blades 44 can be arranged.
  • an adjustment device 50 with a bar- or plate-shaped adjustment element 52 is formed on the drill shaft 12, through which the central line 31 of the feed device 30 between the first removal device 21 and the second removal device 22 can be blocked or opened.
  • the actuator 52 is shown in the closed or locked position.
  • One end of the adjusting element 52 protrudes from the drill shank 12 , a cam bolt 56 pointing radially upwards being provided on the outwardly protruding end to form a link adjusting mechanism 54 .
  • the cam bolt 56 engages in a guide groove 59 in an arcuate link rail 58 which is arranged on the outside of the drill shank 12 .
  • the guide groove 59 runs in the circumferential direction and is approximately semicircular in shape, but at a varying distance from the drilling axis.
  • the link adjusting mechanism 54 is thus formed, with a relative rotation between the link rail 58 with the guide groove 59 and the cam bolt 56 being changed in its radial position relative to the drilling axis. Through the connection between the cam bolt 56 with the actuating element 52, this can be between a closed position and an open position can be adjusted by a relative rotation.
  • the curved guide rail 58 can be attached to a bearing sleeve 60 which is rotatably mounted on the outside of the drill shaft 12 .
  • the upper second removal device 22 can also be arranged on the bearing sleeve 60 .
  • the adjusting element 52 when creating and sinking a borehole with the drilling tool 10, the adjusting element 52 can be brought into its open position, so that in this position, during drilling, drilling fluid or drilling suspension is guided to the lower first outlet openings 35 and directly to the first removal device 21 in drilling can be started.
  • the link adjustment mechanism 54 causes the adjustment element 52 to be adjusted into a closed or blocked position, so that the liquid or suspension that is then supplied can only flow out via the second outlet openings 36 above it at the second Removal device 22 is introduced into the bore.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Soil Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Geology (AREA)
  • Fluid Mechanics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
EP21178238.8A 2021-06-08 2021-06-08 Outil de forage et procédé de production d'un forage dans le sol Pending EP4101987A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP21178238.8A EP4101987A1 (fr) 2021-06-08 2021-06-08 Outil de forage et procédé de production d'un forage dans le sol
PCT/EP2022/064200 WO2022258379A1 (fr) 2021-06-08 2022-05-25 Outil de forage et procédé de fabrication d'un trou de forage dans le sol
US18/568,052 US20240271382A1 (en) 2021-06-08 2022-05-25 Drilling tool and method for creating a bore in the ground

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21178238.8A EP4101987A1 (fr) 2021-06-08 2021-06-08 Outil de forage et procédé de production d'un forage dans le sol

Publications (1)

Publication Number Publication Date
EP4101987A1 true EP4101987A1 (fr) 2022-12-14

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ID=76355259

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21178238.8A Pending EP4101987A1 (fr) 2021-06-08 2021-06-08 Outil de forage et procédé de production d'un forage dans le sol

Country Status (3)

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US (1) US20240271382A1 (fr)
EP (1) EP4101987A1 (fr)
WO (1) WO2022258379A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0441169A2 (fr) * 1990-02-05 1991-08-14 KELLER GRUNDBAU GmbH Procédé et dispositif d'assainissement in situ de zones contaminées
US5304016A (en) * 1992-11-10 1994-04-19 Kabushiki Kaisha Ask Kenkyusho Method for forming a pillar in an earthen foundation
DE102004005967A1 (de) * 2004-02-06 2005-09-08 Bauer Spezialtiefbau Gmbh MIP-Schnecke
EP2156907A1 (fr) * 2008-08-20 2010-02-24 Soletanche Freyssinet Equipement de traitement de polluants dans le sol
WO2015140468A1 (fr) * 2014-03-21 2015-09-24 Soletanche Freyssinet Outillage de forage et bétonnage pour la réalisation d'un pieu en béton dans le sol, et procédé correspondant.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0441169A2 (fr) * 1990-02-05 1991-08-14 KELLER GRUNDBAU GmbH Procédé et dispositif d'assainissement in situ de zones contaminées
US5304016A (en) * 1992-11-10 1994-04-19 Kabushiki Kaisha Ask Kenkyusho Method for forming a pillar in an earthen foundation
DE102004005967A1 (de) * 2004-02-06 2005-09-08 Bauer Spezialtiefbau Gmbh MIP-Schnecke
EP2156907A1 (fr) * 2008-08-20 2010-02-24 Soletanche Freyssinet Equipement de traitement de polluants dans le sol
WO2015140468A1 (fr) * 2014-03-21 2015-09-24 Soletanche Freyssinet Outillage de forage et bétonnage pour la réalisation d'un pieu en béton dans le sol, et procédé correspondant.

Also Published As

Publication number Publication date
US20240271382A1 (en) 2024-08-15
WO2022258379A1 (fr) 2022-12-15

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